A power control method and a base station are provided. The base station obtains a first resource block (RB) set and a second RB set after a power control cycle arrives, wherein the first RB set is an RB set that is allocated by the first base station to first user equipment (UE) in a first cell at each transmission time interval (TTI) in the power control cycle, and the second RB set is an RB set that is allocated by a second base station to second UE in a second cell at each TTI in the power control cycle. Then the base station performs power control on the first UE based on the first RB set and the second RB set.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A power control method, wherein the method comprises: obtaining, by a first base station, a first resource block (RB) set and a second RB set after a power control cycle arrives, wherein the first RB set is an RB set that is allocated by the first base station to first user equipment (UE) in a first cell at each transmission time interval (TTI) in the power control cycle, and the second RB set is an RB set that is allocated by a second base station to second UE in a second cell at each TTI in the power control cycle; and performing, by the first base station, power control on the first UE based on the first RB set and the second RB set, wherein performing, by the first base station, power control on the first UE based on the first RB set and the second RB set comprises: determining, by the first base station based on the first RB set and the second RB set, first system utility corresponding to each TTI in the power control cycle, wherein the first system utility comprises four pieces of system utility obtained if a transmit power control (TPC) command of the first UE at each TTI in the power control cycle is −1, 0, 1, and 3; determining, by the first base station, an optimal TPC command of the first UE at each TTI in the power control cycle based on the first system utility corresponding to each TTI in the power control cycle, wherein the optimal TPC command of the first UE at each TTI in the power control cycle is a TPC command corresponding to maximum system utility in the first system utility corresponding to the TTI; determining, by the first base station, an optimal TPC command of the first UE in the power control cycle based on the optimal TPC command of the first UE at each TTI in the power control cycle; and sending, by the first base station, the optimal TPC command to the first UE, so that the first UE adjusts transmit power based on the optimal TPC command.
2. The method according to claim 1 , wherein determining, by the first base station, the optimal TPC command of the first UE in the power control cycle based on the optimal TPC command of the first UE at each TTI in the power control cycle comprises: collecting, by the first base station, statistics about the optimal TPC commands of the first UE at the TTIs in the power control cycle to determine a most frequent TPC command, and determining the most frequent TPC command as the optimal TPC command of the first UE in the power control cycle.
3. The method according to claim 1 , wherein determining, by the first base station, the optimal TPC command of the first UE in the power control cycle based on the optimal TPC command of the first UE at each TTI in the power control cycle comprises: adding, by the first base station, the optimal TPC commands of the first UE at the TTIs in the power control cycle, to obtain a sum value, and determining an optimal TPC command of the first UE that is in the optimal TPC commands at the TTIs in the power control cycle and that is closest to the sum value as the optimal TPC command of the first UE in the power control cycle.
4. The method according to claim 1 , wherein the first base station calculates system utility by using a preset calculation formula, and the preset calculation formula is: U = ∑ j lg ( x j ) , wherein x j = B × log 2 ( 1 + S I + N ) , U represents the system utility, X j represents a transmission rate of j th UE in a system, B represents a quantity of RBs occupied by the j th UE, S represents transmit power of the j th UE, I represents intensity of interference to the j th UE, and N represents noise strength.
5. A base station, wherein the base station comprises: a processor; and a memory coupled to the processor for storing computer-executable instructions, wherein the computer-executable instructions, when executed by the processor, cause the base station to: obtain a first resource block (RB) set and a second RB set after a power control cycle arrives, wherein the first RB set is an RB set that is allocated by the first base station to first user equipment (UE) in a first cell at each transmission time interval (TTI) in the power control cycle, and the second RB set is an RB set that is allocated by a second base station to second UE in a second cell at each TTI in the power control cycle; perform power control on the first UE based on the first RB set and the second RB set; determine first system utility corresponding to each TTI in the power control cycle based on the first RB set and the second RB set, wherein the first system utility comprises four pieces of system utility obtained if a transmit power control (TPC) command of the first UE at each TTI in the power control cycle is −1, 0, 1, and 3; determine an optimal TPC command of the first UE at each TTI in the power control cycle based on the first system utility corresponding to each TTI in the power control cycle, wherein the optimal TPC command of the first UE at each TTI in the power control cycle is a TPC command corresponding to maximum system utility in the first system utility corresponding to the TTI; determine an optimal TPC command of the first UE in the power control cycle based on the optimal TPC command of the first UE at each TTI in the power control cycle; and send the optimal TPC command to the first UE, so that the first UE adjusts transmit power based on the optimal TPC command.
6. The base station according to claim 5 , wherein the computer-executable instructions, when executed by the processor, further cause the base station to: collect statistics about the optimal TPC commands of the first UE at the TTIs in the power control cycle to determine a most frequent TPC command, and determining the most frequent TPC command as the optimal TPC command of the first UE in the power control cycle.
7. The base station according to claim 5 , wherein the computer-executable instructions, when executed by the processor, further cause the base station to: add the optimal TPC commands of the first UE at the TTIs in the power control cycle, to obtain a sum value, and determining an optimal TPC command of the first UE that is in the optimal TPC commands at the TTIs in the power control cycle and that is closest to the sum value as the optimal TPC command of the first UE in the power control cycle.
8. The base station according to claim 5 , wherein the computer-executable instructions, when executed by the processor, further cause the base station to: calculate system utility by using a preset calculation formula, and the preset calculation formula is: U = ∑ j lg ( x j ) , wherein x j = B × log 2 ( 1 + S I + N ) , U represents the system utility, X j represents a transmission rate of j th UE in a system, B represents a quantity of RBs occupied by the j th UE, S represents transmit power of the j th UE, I represents intensity of interference to the j th UE, and N represents noise strength.
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January 25, 2019
September 22, 2020
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